Assessment of Creep Properties Using Small Punch Test for a 9%Cr-Mo-Co-B Power Plant Steel

The present study provides a feasible method to evaluate creep properties for 9%Cr-Mo-Co-B power plant steel by comparing two sets of data obtained from small punch tests and conventional uniaxial tests. includes three steps: firstly, conduct series in different load temperature conditions; secondly, convert the central deflection test stress strain data; thirdly, determinate best fit correlation factor selected models. It is found that show similar trend stress–rupture time relation, stress–minimum rate relation LMP–stress relation. factor, ksp, can effectively bridge gap between test. For high-Cr martensitic heat-resistant named as CB2, ksp value 1.4 make good prediction rupture time, while minimum Larson–Miller parameter, will lead conservative low-stress range.